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25#include "libbb.h"
26
27const char* FAST_FUNC make_human_readable_str(unsigned long long val,
28 unsigned long block_size, unsigned long display_unit)
29{
30 static const char unit_chars[] ALIGN1 = {
31 '\0', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'
32 };
33
34 unsigned frac;
35 const char *u;
36 const char *fmt;
37
38 if (val == 0)
39 return "0";
40
41 fmt = "%llu";
42 if (block_size > 1)
43 val *= block_size;
44 frac = 0;
45 u = unit_chars;
46
47 if (display_unit) {
48 val += display_unit/2;
49 val /= display_unit;
50
51 } else {
52 while ((val >= 1024)
53
54 ) {
55 fmt = "%llu.%u%c";
56 u++;
57 frac = (((unsigned)val % 1024) * 10 + 1024/2) / 1024;
58 val /= 1024;
59 }
60 if (frac >= 10) {
61 ++val;
62 frac = 0;
63 }
64#if 1
65
66 if (block_size == 0) {
67 if (frac >= 5) {
68 ++val;
69 }
70 fmt = "%llu%*c";
71 frac = 1;
72 }
73#endif
74 }
75
76 return auto_string(xasprintf(fmt, val, frac, *u));
77}
78
79
80
81
82
83
84char* FAST_FUNC smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale)
85{
86 const char *fmt;
87 char c;
88 unsigned v, u, idx = 0;
89
90 if (ul > 99999) {
91 ul *= 10;
92 do {
93 ul /= 1024;
94 idx++;
95 } while (ul >= 100000);
96 }
97 v = ul;
98
99 fmt = " 123456789";
100 u = v / 10;
101 v = v % 10;
102 if (!idx) {
103
104
105 c = buf[0] = " 123456789"[u/1000];
106 if (c != ' ') fmt = "0123456789";
107 c = buf[1] = fmt[u/100%10];
108 if (c != ' ') fmt = "0123456789";
109 c = buf[2] = fmt[u/10%10];
110 if (c != ' ') fmt = "0123456789";
111 buf[3] = fmt[u%10];
112 buf[4] = "0123456789"[v];
113 } else {
114
115
116 if (u >= 100) {
117
118 c = buf[0] = " 123456789"[u/1000];
119 if (c != ' ') fmt = "0123456789";
120 c = buf[1] = fmt[u/100%10];
121 if (c != ' ') fmt = "0123456789";
122 v = u % 10;
123 u = u / 10;
124 buf[2] = fmt[u%10];
125 } else {
126
127 c = buf[0] = " 123456789"[u/10];
128 if (c != ' ') fmt = "0123456789";
129 buf[1] = fmt[u%10];
130 buf[2] = '.';
131 }
132 buf[3] = "0123456789"[v];
133 buf[4] = scale[idx];
134 }
135 return buf + 5;
136}
137
138
139
140
141char* FAST_FUNC smart_ulltoa4(unsigned long long ul, char buf[4], const char *scale)
142{
143 const char *fmt;
144 char c;
145 unsigned v, u, idx = 0;
146
147 if (ul > 9999) {
148 ul *= 10;
149 do {
150 ul /= 1024;
151 idx++;
152 } while (ul >= 10000);
153 }
154 v = ul;
155
156 fmt = " 123456789";
157 u = v / 10;
158 v = v % 10;
159 if (!idx) {
160
161
162 c = buf[0] = " 123456789"[u/100];
163 if (c != ' ') fmt = "0123456789";
164 c = buf[1] = fmt[u/10%10];
165 if (c != ' ') fmt = "0123456789";
166 buf[2] = fmt[u%10];
167 buf[3] = "0123456789"[v];
168 } else {
169
170 if (u >= 10) {
171
172 c = buf[0] = " 123456789"[u/100];
173 if (c != ' ') fmt = "0123456789";
174 v = u % 10;
175 u = u / 10;
176 buf[1] = fmt[u%10];
177 } else {
178
179 buf[0] = "0123456789"[u];
180 buf[1] = '.';
181 }
182 buf[2] = "0123456789"[v];
183 buf[3] = scale[idx];
184 }
185 return buf + 4;
186}
187